NOCTILUCENT CLOUDS AND UNPUBLISHED MEASUREMENTS OF THEIR VELOCITY
نویسندگان
چکیده
منابع مشابه
Noctilucent clouds and the mesospheric water vapour
The topic of this paper is the expected (from modelling) and observed sensitivity of the brightness β of noctilucent clouds (NLC) on the ambient water vapour mixing ratio f (H 2 O). Firstly, we show that state-of-the-art models of NLC layer formation predict that in the Arctic summer, a 10% increase of f (H 2 O) in the upper mesosphere should 5 lead to a 22% increase in β. Secondly, we review o...
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The topic of this paper is the sensitivity of the brightness of noctilucent clouds (NLC) on the ambient water vapour mixing ratio f(H2O). Firstly, we use state-of-the-art models of NLC layer formation to predict NLC brightness changes in response to changes in the 80 km mixing ratio f(H2O) for the two cases of ground-based 532 nm lidar observations at 69 N and for hemispheric satellite SBUV obs...
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Models that reproduce the observed high-velocity clouds (HVCs) also predict clouds at lower radial velocities that may easily be confused with Galactic disk (|z| < 1 kpc) gas. We describe the first search for these low-velocity halo clouds (LVHCs) using IRAS data and the initial data from the Galactic Arecibo L-band Feed Array survey in Hi (GALFA-Hi). The technique is based upon the expectation...
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1928
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1928)56<278:ncaumo>2.0.co;2